Proxy Settings

I'm trying to FTP via CCProxy but cannot get it to work. The proxy works OK with web browsing so I know that the proxy is running OK and that the port forwarding is OK. I've set up the proxy to accept FTP connections on port 2121 and have created the appropriate firewall rule.

Now I have no experience previously with proxies so I'm a little stumped at how I should set up SmartFTP to access it. Looking at the properties of my favourite connection in SmartFTP I'm confused by the two proxy areas (Connection -> Proxy and FTP->Connection->Proxy)